Author(s): Yong-Jun Kwon; Hyeok Cheol Shin; Ichiro Kimura; Shinichiro Onda; Donghwan Jang; Hyung Suk Kim
Linked Author(s): Ichiro Kimura, Hyung Suk Kim, Shinichiro Onda
Keywords: Numerical analysis 3D model Free surface Density function
Abstract: Recently, extreme flooding caused by typhoons and heavy rainfall linked to climate change has increasingly resulted in property damage and loss of life. In the event of flooding, complex flow structures were observed around bridges, including overtopping and pressure flows. Therefore, it is important to understand these flow characteristics. 3D numerical simulations were conducted for analyzing complex free surface flows under conditions where water flows over a bridge. The density function method was applied to accurately represent the free surface profiles. Numerical model was validated with experimental data of overtopping flow through a bridge. The simulation showed that a hydraulic jump-like phenomenon and turbulent flow were observed near the bridge deck as the flow passed over it. Furthermore, the scenario can be expanded to incorporate varying hydrological conditions for this 3D model.
Year: 2025